[ale] ICMP Echo Disable

Danny Cox danny at compgen.com
Wed Oct 4 12:36:42 EDT 2000


All,

	I recently wrote:
Stephen,

On Wed, 4 Oct 2000, Stephen Pellicer wrote:

> > On Wed, Oct 04, 2000 at 10:47:52AM -0400, frost33 at mindspring.com wrote:
> > > Is there a way to turn off ping capabilities on the fly?  In other
> words,
> if you were getting flooded by pings, is there any way to stop the attack
> without killing your connection?
> 
>         There is another way, on-the-fly.  You can turn off all icmp echo
> replies by saying:
> 
>         echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_all
> 
> or broadcast response by:
> 
>         echo 0 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
> 
> as root.
> 
>         See ...src/linux/Documentation/proc.txt for further info.

	Well, I got it backwards (Doh!).  Make both of those 'echo 1'
instead of 'echo 0'.

Danny

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